std::basic_string 特化 [英] std::basic_string specialization

问题描述

我只需要覆盖 std::basic_string 中的 length 函数，因为它对于特定平台上的自定义字符类型不正确.这是当前声明，比方说，CustomString

I need to override only length function from std::basic_string because it's not correct for a custom char type on a specific platform. This is current declaration for, let's say, CustomString

typedef STL::basic_string<CustomChar, STL::char_traits<CustomChar>, STL::allocator<CustomChar> > CustomString;

我需要一个类，其行为与 CustomString 相同，但长度函数已更改.

I need to have a class that behaves as CustomString, but with the length function changed.

推荐答案

你需要专门化std::char_traits 结构并覆盖它的 static size_t length(const char_type* s); 函数来做到这一点.

You need to specialise the std::char_traits structure and override its static size_t length(const char_type* s); function to do that.

那么在实例化basic_string时甚至不需要指定所有模板参数.以下定义应该足够了:

Then you don’t even need to specify all the template parameters when instantiating a basic_string. The following definition should be enough:

typedef std::basic_string<CustomChar> CustomString;

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